Abstract
I use the example of the short treatises on the Decalogue circulating in late medieval Bohemia (i.e. those by John Wyclif, Jan Hus, Henricus de Frimaria, Václav of Dráchov, Jacobellus of Mies, Nicolaus de Dinkelsbühl and many others) to consider the methodological problems with investigating late medieval devotion. The boom of the interest in the Decalogue in late Middle Age sis surely at least partly due to the Lateran Council of 1215.
Yet, the omnipresence of the decalougue in theology, sermons, catechism, mnemonics, and also on church walls is striking.